Corn-grader.



II MMMMII MMIM MMII MMI l MMI' M I' MMI' MMMMMI MM MM MIMMMM MIM IM|MMMM MIMMMM MMMM M|M M 3MMMM MMM M M MM MMMMMMMIMM i MM MMM MMM MMM MMM MMIALFRED S'IRUBLE, 0F @ARTI-LAGE, ILLINOIS.

CORN-GRADER.

Specification of Letters Patent.

Patented Apn'i 21, 1908.

Application filed April 15, 1907. Serial No. 368,287.

To all whom it may concern:

Be it known that I, ALFRED STRUBLE, a citizen of the United States,residing at Carthage, in the county of Hancock and State of Illinois,have invented a new and useful Corn-Grader, of which the following is aspecification.

This invention has relation to corn graders or riddles and it consistsin the novel construction and arrangement of its parts as hereinaftershown and described.

The object of the invention is to provide a means for separating grainsof corn of regular shape from the irregular grains. The regular kernelsthus separated being preferable for seeding purposes.

The grader consists of a metallic sheet having openings extendingtransversely with relation to the same and being elongated so as toermit long and narrow grains to pass theretlhrough edgewise while theround and irregular grains will roll over the perforations and fall fromthe end of the sheet. h/leans is provided for jarring or moving thesheet in order to keep the grains in a state of agitation and the sheetis inclined at a suitable angle. The said openings are arranged in rowswhich extend longitudinally of the sheet and the metal between theadjacent openings4 of the rows is concaved in order that the long andnarrow grains may rest therein upon their edges and consequently will bemore apt to turn and pass through the openings as the sheet is jarred.The said concaved portions are slightly longer than the said openings.

In the accompanying drawing z-Figure l is a perspective view of aportion of the riddle. Fig. 2 is a top plan view of a portion of thesame. Fig. 3 is a sectional view cut on the line 3-3 of Fig. 2, and Fig.4 is a sectional view cut on the line iw-4 of Fig. 2.

The grader consists of the sheet l which is inclined and means isprovided Jfor jarring or moving the said sheet in order to keep thegrain which is deposited thereon in a state of agitation. The said sheetis rovided with the elongated openings 2, the enger axes of which aredisposed transversely of the sheet. The said openings are arranged inrows which extend longitudinally of the sheet. The metal of the sheetlying between the adjacent openings of the rows is concaved as at 3 andsaid concavities are slightly longer than the said openings.

In operation the sheet is kept in a state of motion manually or by owerand the grain.

is deposited upon the e evated end portion thereof. As the grain runsdown along the sheet the round or irregular shaped kernels will run overthe openings 2 and fall from the lower end of the sheet while long andnarrow grains will lodge upon their edges in the concavities 3 and asthey jostle out of the said concavities they turn axially and pass downthrough the next lower adjacent openings 12. Thus the long and narrowgrains which are preferred for seeding purposes pass through the riddleand the other grain passes from the end of the riddle and thedi'l'i'erent kinds of grain are separated.

Having described my invention what I claim as new and desire to secureby Letters- Patent is:

l. A grader comprising a metallic sheet having a plurality of rows ofelongated open ings and elongated concavities parallel with theopenings, the edges of which form the edges oi the openings.

2. A grader comprising a metallic sheet having a plurality of rows ofelongated openings and elongated concavities parallel with the openings,the successive rows being arranged in staggered order with relation toeach other.

In testimony that I claim the foregoing as my own, I have hereto aflixedmy signature in the presence of two witnesses.

ALFRED STRUBLE.

I/Vitnesses S. A. SYuPsoN, IVM. BECKELLYMER.

